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I'm interested in finding something out about the history of the problem of the delta potential barrier in QM. Who was the first to propose this problem, and perhaps any particular motivation for it. References that I could read and quote would be excellent. I am aware of some of the usual motivations for using it, but any examples that come to mind are appreciated.

Thanks

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merged by HDE 226868 Aug 19 '15 at 21:32

This question was merged with History of delta barrier in quantum mechanics because it is an exact duplicate of that question.